CN107993679A - A kind of playback method of the buffer-type MP3 music players of embedded bluetooth headset - Google Patents
A kind of playback method of the buffer-type MP3 music players of embedded bluetooth headset Download PDFInfo
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- CN107993679A CN107993679A CN201711066668.6A CN201711066668A CN107993679A CN 107993679 A CN107993679 A CN 107993679A CN 201711066668 A CN201711066668 A CN 201711066668A CN 107993679 A CN107993679 A CN 107993679A
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/10527—Audio or video recording; Data buffering arrangements
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/10527—Audio or video recording; Data buffering arrangements
- G11B2020/10537—Audio or video recording
- G11B2020/10546—Audio or video recording specifically adapted for audio data
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/10527—Audio or video recording; Data buffering arrangements
- G11B2020/1062—Data buffering arrangements, e.g. recording or playback buffers
- G11B2020/10675—Data buffering arrangements, e.g. recording or playback buffers aspects of buffer control
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- Multimedia (AREA)
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- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a kind of playback method of the buffer-type MP3 music players of embedded bluetooth headset, the playback method includes：The MCU of bluetooth headset reads the listing file A built on inside MCU and whether contrast current SD card song information consistent, if inconsistent, updates listing file A；Song information in MCU read list files A, loads song information in buffer；MCU loads the information of current song, reads the data of song files；Start buffer, read the data of song, be saved in buffer；The on a frame-by-frame basis data in play-out buffer internal buffer, finish playing a frame, play next frame and produce callback signal, the data that buffer reads song are saved in buffer to keep at least two frame data in buffering area until current song finishes, its cost is low, the fluency that is efficient and ensure that playback of songs of system operation.
Description
Technical field
The present invention relates to electronic equipment, more particularly to a kind of buffer-type MP3 music players of embedded bluetooth headset are broadcast
Put method.
Background technology
Gradually occur on product of the bluetooth headset with the offline players of MP3 currently on the market, but due to MP3 decoding
Journey is excessively complicated, can consume bluetooth headset MCU substantial amounts of processing times, so most of product can all select third party to develop
Module is realized, but a shortcoming substantially occurs among these, is exactly additionally to have added more a MCU, can so be increased product
Power consumption and cost.Further, since the disposal ability of bluetooth headset MCU is limited, such as directly transplanting MP3 decoding device to bluetooth headset
If MCU realizes the whole function of broadcasting, bluetooth headset MCU, which works together, also seems very painstaking.
The content of the invention
It is a primary object of the present invention to overcome the shortcomings of above-mentioned background technology, there is provided a kind of buffering of embedded bluetooth headset
The playback method of formula MP3 music players, its cost is low, the fluency that is efficient and ensure that playback of songs of system operation.
Above-mentioned purpose is achieved by the following technical solution：
The playback method of the buffer-type MP3 music players of a kind of embedded bluetooth headset, in the MCU firmwares of bluetooth headset
The MP3 decoding device that transplanting has a module of FAT32 file system and third party increases income, the playback method include：
The MCU of bluetooth headset read the listing file A built on inside MCU and contrast current SD card song information whether one
Cause, if inconsistent, update listing file A；
Song information in MCU read list files A, loads song information in buffer；
MCU loads the information of current song, reads the data of song files；
Start buffer, read the data of song, be saved in buffer；
The on a frame-by-frame basis data in play-out buffer internal buffer, finish playing a frame, plays next frame and produces back
Signal is adjusted, the data that buffer reads song are saved in buffer to keep at least two frame data in buffering area until current song
Song finishes.
In some embodiments, when SD card being inserted into MCU first, MCU creates listing file A and by all MP3 type
The path and name of file recorded in listing file A.
In some embodiments, when the information of MCU loading current songs, after reading the data of song files, MCU judges
Whether buffering area A is idle to a certain extent, if so, starting buffer, reads the data of song, is saved in buffer；If it is not,
MCU judges whether buffer is starting, if so, starting buffer, reads the data of song, is saved in buffer.
In some embodiments, start buffer, read the data of song, after being saved in buffer, MCU judges buffering
It is a degree of whether area A is filled into, if so, closing buffer.
In some embodiments, if it in startup or buffering area A is not to be filled into certain journey that MCU, which judges that buffer is not,
Degree, MCU reads a frame data of buffering area A, judges whether data are empty, if so, setting flag bit；An if it is not, frame data
Decoded.
In some embodiments, after a frame data are decoded, MCU judges whether buffering area B has two frame data, if
It is no, repeat MCU judge buffering area A whether free time to a certain extent the step of；If so, the frame that finishes playing, plays next frame simultaneously
Produce callback signal.
In some embodiments, after setting flag bit or producing callback signal, MCU judges whether data have read,
If so, song switching is carried out according to listing file A；If it is not, repeat MCU judge buffering area A whether free time step to a certain extent
Suddenly.
Compared with prior art, the present invention at least have the effect that：
1st, the playback method of the buffer-type MP3 music players of a kind of embedded bluetooth headset of the invention, third party is opened
The MP3 decoding device in source is transplanted in bluetooth headset MCU firmwares, passes through the optimization of MP3 decoding device, the change (generation of MCU operational modes
Code is transferred on ram from flash), command operating cycle is reduced, so as to form the effect of acceleration.By the data in SD card, use
Data, are transferred in the RAM of MCU by the mode of buffering in advance, improve the efficiency of system operation.Music player employs half
Half mode played is preserved, ensure that the fluency of playback of songs.
Brief description of the drawings
Fig. 1 is the flow diagram of playback method in embodiment.
Embodiment
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
Embodiment one：As shown in Figure 1, the present embodiment is a kind of buffer-type MP3 music players of embedded bluetooth headset
Playback method, the MP3 that transplanting has a module of FAT32 file system in the MCU firmwares of bluetooth headset and third party increases income
Decoder, the playback method include：
The MCU of bluetooth headset read the listing file A built on inside MCU and contrast current SD card song information whether one
Cause, if inconsistent, update listing file A；
Song information in MCU read list files A, loads song information in buffer buffer；
MCU loads the information of current song, reads the data of song files；
Start buffer, read the data of song, be saved in buffer；
The on a frame-by-frame basis data in play-out buffer internal buffer, finish playing a frame, plays next frame and produces back
Signal is adjusted, the data that buffer reads song are saved in buffer to keep at least two frame data in buffering area until current song
Song finishes.
A kind of playback method of the buffer-type MP3 music players of embedded bluetooth headset of the present embodiment, third party is opened
The MP3 decoding device in source is transplanted in bluetooth headset MCU firmwares, passes through the optimization of MP3 decoding device, the change (generation of MCU operational modes
Code is transferred on ram from flash), command operating cycle is reduced, so as to form the effect of acceleration.By the data in SD card, use
Data, are transferred in the SRAM of MCU by the mode of buffering in advance, improve the efficiency of system operation.Music player employs
Half preserves half mode played, ensure that the fluency of playback of songs.
In addition, the insertion of FAT32 file system so that bluetooth MCU can read file all in SD and new files.
In addition, the third-party decoding storehouse of the Scheme Choice of MP3 decoding, since third-party decoding storehouse is suitable for high-performance
Processor, but the performance of this bluetooth MCU can be tackled reluctantly, so needing to carry out part optimization to decoding storehouse source code and repairing
Change.Source code is largely that c language is write, it is only necessary to the code equivalence of c language is changed into assembler language, it is possible to reach one
Surely the result optimized.The code module of MP3 relative decodings, Code transformations are run relevant on RAM on RAM in flash
Code module, reduces the command operating cycle of processor, so that speed can be multiplied several times, preferably optimizes power consumption.
Further, when SD card being inserted into MCU first, MCU creates listing file A and by the road of all MP3 type files
Footpath and name record are in listing file A.When starting MCU next time, all the elements in the first active read list file A of meeting,
So as to obtain the message of song, then contrasted, if changed, be updated listing file A, otherwise without any behaviour
Make.By the record content of listing file A, the state of player can be recovered rapidly.
Further, when the information of MCU loading current songs, after reading the data of song files, MCU judges buffering area A
Whether it is idle to a certain extent, if so, starting buffer, read the data of song, be saved in buffer；If it is not, MCU judges
Whether buffer is starting, if so, starting buffer, reads the data of song, is saved in buffer.
Further, start buffer, read the data of song, after being saved in buffer, whether MCU judges buffering area A
Be filled into it is a degree of, if so, close buffer.
Further, if it in startup or buffering area A is not to be filled into a degree of, MCU that MCU, which judges that buffer is not,
A frame data of buffering area A are read, judge whether data are empty, if so, setting flag bit；If it is not, a frame data are decoded.
Further, after a frame data are decoded, MCU judges whether buffering area B has two frame data, if it is not, repeating MCU
Judge buffering area A it is whether idle to a certain extent the step of；If so, the frame that finishes playing, plays next frame and produces readjustment letter
Number.
Further, after setting flag bit or producing callback signal, MCU judges whether data have read, if so, according to
The listing file A carries out song switching in buffer buffer；If it is not, repeating MCU judges whether buffering area A is idle to certain
The step of degree.
MP3 decoding is all on a frame-by-frame basis decoded, and music player in this design, and does not have real-time, passes through
The buffer of song is buffered, postpones the reproduction time of a frame, ensure that the fluency of player.Broadcast mode is played using a frame
One frame buffering (half preserve half play), keeps buffering area to have the size of data of two frames, when a frame finishes playing, will produce one
The signal of a readjustment, after receiving this signal, bluetooth MCU can carry out the decoding of next frame, be filled into automatically after the completion of decoding slow
Rush area.
MP3 player all on a frame-by-frame basis plays, since MCU is to be communicated by SDIO with exterior SD card, every time
Read the data volume of a frame and little, cause to communicate that number is excessively frequent, MCU power consumptions and take MCU resource it is unreasonable.
This, just introduces a kind of new processing mode, is exactly to increase the data volume for reading file every time, without used data buffering
Get up, once buffering area filling is to a certain degree, just stops buffering and read file data, MP3 decoding device extraction data are direct
From buffering area extraction can, when extract certain degree will retriggered buffer, be again started up data buffering
Mode.In this manner, greatly reduce the number that MCU is communicated with exterior SD card, so as to play the role of optimizing MCU power consumptions.
In addition, the present embodiment provides a kind of bluetooth MP3 sports earphones, by the MCU that MP3 player is embedded in bluetooth headset
Firmware, extends out MP3 modules to reduce, reduces cost, optimize power consumption.
Finally, the present embodiment also provides a kind of bluetooth MP3 laser earphones, by the way that MP3 player is embedded in bluetooth headset
MCU firmwares, extend out MP3 modules to reduce, reduce cost, optimize power consumption.
Above-described is only some embodiments of the present invention.For those of ordinary skill in the art, not
On the premise of departing from the invention design, various modifications and improvements can be made, these belong to the protection model of the present invention
Enclose.
Claims (7)
1. the playback method of the buffer-type MP3 music players of a kind of embedded bluetooth headset, it is characterised in that in bluetooth headset
The MP3 decoding device that transplanting has a module of FAT32 file system in MCU firmwares and third party increases income, the playback method include：
The MCU of bluetooth headset reads the listing file A built on inside MCU and whether contrast current SD card song information consistent,
If inconsistent, listing file A is updated；
Song information in MCU read list files A, loads song information in buffer；
MCU loads the information of current song, reads the data of song files；
Start buffer, read the data of song, be saved in buffer；
The on a frame-by-frame basis data in play-out buffer internal buffer, finish playing a frame, plays next frame and produces readjustment letter
Number, the data that buffer reads song are saved in buffer to keep at least two frame data in buffering area until current song is broadcast
Discharge complete.
2. a kind of playback method of the buffer-type MP3 music players of embedded bluetooth headset according to claim 1, it is special
Sign is, when SD card being inserted into MCU first, MCU creates listing file A and remembers the path and name of all MP3 type files
Record in listing file A.
3. a kind of playback method of the buffer-type MP3 music players of embedded bluetooth headset according to claim 1 or 2,
It is characterized in that, when the information of MCU loading current songs, after reading the data of song files, MCU judges whether buffering area A is empty
It is not busy to a certain extent, if so, starting buffer, read the data of song, be saved in buffer；If it is not, MCU judges buffer
Whether starting, if so, starting buffer, reading the data of song, be saved in buffer.
4. a kind of playback method of the buffer-type MP3 music players of embedded bluetooth headset according to claim 3, it is special
Sign is, starts buffer, reads the data of song, after being saved in buffer, MCU judges whether buffering area A is filled into necessarily
Degree, if so, closing buffer.
5. a kind of playback method of the buffer-type MP3 music players of embedded bluetooth headset according to claim 4, it is special
Sign is, if it in startup or buffering area A is not to be filled into a degree of that MCU, which judges that buffer is not, MCU reads buffering area
A frame data of A, judge whether data are empty, if so, setting flag bit；If it is not, a frame data are decoded.
6. a kind of playback method of the buffer-type MP3 music players of embedded bluetooth headset according to claim 5, it is special
Sign is, after a frame data are decoded, MCU judges whether buffering area B has two frame data, if it is not, repeating MCU judges buffering area
A it is whether idle to a certain extent the step of；If so, the frame that finishes playing, plays next frame and produces callback signal.
7. a kind of playback method of the buffer-type MP3 music players of embedded bluetooth headset according to claim 6, it is special
Sign is that after setting flag bit or producing callback signal, MCU judges whether data have read, if so, according to listing file A
Carry out song switching；If it is not, repeat MCU judge buffering area A whether free time to a certain extent the step of.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711066668.6A CN107993679A (en) | 2017-11-02 | 2017-11-02 | A kind of playback method of the buffer-type MP3 music players of embedded bluetooth headset |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711066668.6A CN107993679A (en) | 2017-11-02 | 2017-11-02 | A kind of playback method of the buffer-type MP3 music players of embedded bluetooth headset |
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| CN107993679A true CN107993679A (en) | 2018-05-04 |
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| CN201711066668.6A Pending CN107993679A (en) | 2017-11-02 | 2017-11-02 | A kind of playback method of the buffer-type MP3 music players of embedded bluetooth headset |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109151194A (en) * | 2018-08-14 | 2019-01-04 | Oppo广东移动通信有限公司 | Data transmission method, device, electronic equipment and storage medium |
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| CN104183250A (en) * | 2014-08-26 | 2014-12-03 | 惠州Tcl移动通信有限公司 | Method and system for synchronizing function of music player of intelligent device and Bluetooth headset |
| CN104240739A (en) * | 2014-09-04 | 2014-12-24 | 广东欧珀移动通信有限公司 | Music playing method and device for mobile terminal |
| CN105429984A (en) * | 2015-11-27 | 2016-03-23 | 刘军 | Media play method, equipment and music teaching system |
| US20160132287A1 (en) * | 2014-11-12 | 2016-05-12 | Microsoft Technology Licensing, Llc | Dynamic Reconfiguration of Audio Devices |
| US20170185374A1 (en) * | 2004-06-25 | 2017-06-29 | Apple Inc. | Using a plurality of buffers to provide audio for synchronized playback to multiple audio devices having separate device clocks |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170185374A1 (en) * | 2004-06-25 | 2017-06-29 | Apple Inc. | Using a plurality of buffers to provide audio for synchronized playback to multiple audio devices having separate device clocks |
| CN104183250A (en) * | 2014-08-26 | 2014-12-03 | 惠州Tcl移动通信有限公司 | Method and system for synchronizing function of music player of intelligent device and Bluetooth headset |
| CN104240739A (en) * | 2014-09-04 | 2014-12-24 | 广东欧珀移动通信有限公司 | Music playing method and device for mobile terminal |
| US20160132287A1 (en) * | 2014-11-12 | 2016-05-12 | Microsoft Technology Licensing, Llc | Dynamic Reconfiguration of Audio Devices |
| CN105429984A (en) * | 2015-11-27 | 2016-03-23 | 刘军 | Media play method, equipment and music teaching system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109151194A (en) * | 2018-08-14 | 2019-01-04 | Oppo广东移动通信有限公司 | Data transmission method, device, electronic equipment and storage medium |
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